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Most Helpful Positive Review
Smaller diameter gas rings are by design
Just fyi, fellas, JP’s smaller diameter gas rings are, in-fact by design. It spooked me too when I first got my JP LMOS, & I even replaced ‘em when I saw it wouldn’t hold up to the ‘stand test’ & the bolt dropped straight inside the carrier. But upon READING the literature that was provided (at leas...
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Most Helpful Negative Review
Enhanced Gas Ring Doesn't Interface with BC Right, too loose
The title says it all. This bolt is dimensionally correct (verified with calipers), but the enhanced gas ring is dimensionally smaller than the standard diameter of the normal three gas rings. It slides loosely in the BC. No bueno! I had to replace the rings to get it to work. So for the price, I co...
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JP. what more can I say.
This bolt is of the highest quality. The fit and function are second to none. It is really clear to see the even wear marks on all parts of this bolt, which are not really wear marks but contact points. When a person has built and run as many AR platform rifles as I have you learn where money is well spent. And this is second only to quality barrels.
Pros:
- It works. and works right
Cons:
- I don't have one in every rifle yet
Best Used for:
- any AR build
Would recommend: Yes
This is a nice bolt
I installed this in a 400 Legend AR15. It works wonderfully well. The Valkerie, 6.8 SPC and 400 Legend have the same case head. So it fits and functions very well. Fit and finish is perfect. Now, this corrected primer extrusion around the firing pin.
Would recommend: Yes
This changed my rifle to the good!
I installed this on a 400 Legend I built. I handload my ammo, and this allows me to progress to the upper end of my pressure range without primer extrusion. Although my load was not close to maximum, i was getting primer extrusion around the firing pin indent. After this upgrade i am cruising 1/2 a grain under maximum with no primer extrusion at all. There never was any over pressure signs other than primer extrusion.
Would recommend: Yes
Same as the other guy, the enhanced gas rungs are junk
I'm sure the bolt will be fine but you would think that if you spent this kind of money on a premium bolt that they would have their act together. The one-piece "enhanced" gas ring was too loose and wouldn't even hold the weight of the carrier. Swapped it out for standard mil-spec rings, good to go.
Pros:
- Stronger bolt
Cons:
- Have to swap the gas rings out
Best Used for:
- Pew pew pew
Would recommend: Yes
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